Engineering Investigation of the Bunker Hill Basin 2010–2011 · Engineering Investigation Of the...

151
Engineering Investigation of the Bunker Hill Basin 2010–2011 Prepared By: Revised March 9, 2011 1 of 151

Transcript of Engineering Investigation of the Bunker Hill Basin 2010–2011 · Engineering Investigation Of the...

  • Engineering Investigation of the

    Bunker Hill Basin 20102011

    Prepared By:

    Revised March 9, 2011

    1 of 151

  • 2 of 151

  • Engineering Investigation Of the

    Bunker Hill Basin 2010-2011

    Groundwater Conditions in the San Bernardino Valley

    Water Conservation District

    Revised March 9, 2011

    San Bernardino Valley Water Conservation District Board of Directors

    Clare Henry Day, President

    Melody McDonald, Vice President David E. Raley

    Arnold L. Wright John Longville

    Manuel Aranda, Jr. Richard Corneille

    Daniel B. Cozad, General Manager

    3 of 151

  • 4 of 151

  • Acknowledgments

    This report is a cooperative effort of the water districts, cities and other water agencies in the

    region without whose help and cooperation this report would not be possible. Special thanks this

    year is extended to Steve Luhn from SBVMWD for his help, experience and coordination. Our

    thanks also goes to the hard working part-time interns Ryan Hejka and Matthew OCarroll and

    consulting support from Lisa A. Pierce. Production assistance from Eunice Griffith and Athena

    Medina.

    The District also wishes to thank the following agencies:

    San Bernardino Valley Municipal Water District

    City of Colton

    City of Loma Linda

    City of Redlands

    City of Rialto

    City of Riverside

    City of San Bernardino

    East Valley Water District

    San Bernardino County Department of Transportation and Flood Control

    Gage Canal Company

    West San Bernardino County Water District

    Western Municipal Water District

    United States Geological Survey, Santee, CA Office

    Watermaster Support Services, Steve Mains

    As well as many other entities who document well water withdrawal and water level events

    throughout the year. Their coordinating efforts provide verified information and digital

    information to simplify management of production data more assessable for all use in the future.

    5 of 151

  • 6 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin i

    Figures ............................................................................................................ iii

    Tables .............................................................................................................. iv

    Appendices ................................................................................................... v

    1.0 Executive Summary ................................................................................. 1

    2.0 Introduction .............................................................................................. 8

    2.1 Purpose and Scope ....................................................................................... 8

    2.2 Location, Topography and Climate ........................................................... 11

    2.3 Definition of Terms ...................................................................................... 12

    2.4 Sources of Data ........................................................................................... 13

    3.0 Fall 2009 Groundwater Elevation Contours ......................................... 15

    3.1 Hydrographs for Key Wells in the Bunker Hill Basin ............................... 15

    4.0 Task 1 - Annual Change in Storage (Fall 2009 to Fall 2010) ............... 15

    4.1 Hydrologic Sub-areas ................................................................................. 15

    4.2 Area and Storativity .................................................................................... 16

    4.3 Groundwater Level Elevation Changes ..................................................... 16

    4.4 Change in Groundwater Storage ............................................................... 16

    5.0 Task 2 - Accumulated Change in Storage from Fall 1989 to Fall 2010 ........................................................................................ 17

    6.0 Task 3 - Total Groundwater Production for the Preceding Water Year (July 1, 2009 to June 30, 2010) ......................................................................... 18

    7.0 Task 4 - Estimate of the Annual Change in Storage for the Current Water Year (July 1, 2010 to June 30, 2011) ..................................................... 19

    7 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin ii

    8.0 Task 5 - Estimate of the Annual Change in Storage for the Ensuing Water Year (July 1, 2011 to June 30, 2012) ..................................................... 21

    9.0 Task 6 - Average Annual Change in Storage for the Immediate Past 10 Water Years .................................................................................................. 21

    10.0 Task 7 - Estimated Amount of Agricultural Water and Other Than Agricultural Water to be Withdrawn for the Ensuing Water Year (July 1, 2011 to June 30, 2012) ...................................................................................... 21

    11.0 Task 8 - Estimated Amount of Water for Surface Distribution for the Ensuing Water Year (July 1, 2011 to June 30, 2012) ...................................... 23

    12.0 Task 9 - Estimated Amount of Water for Replenishment of the Groundwater Supplies for the Ensuing Water Year (July 1, 2011 to June 30, 2012) ................................................................................................................. 24

    13.0 General Findings .................................................................................... 25

    14.0 Conclusions ............................................................................................ 26

    15.0 Financial Data ......................................................................................... 26

    8 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin iii

    Figures

    Figure 1 Bunker Hill Basin Watershed Map

    Figure 2 Conservation District and Water Agency Boundaries

    Figure 3 Sub-areas of Bunker Hill Basin

    Figure 4 Precipitation Trends and Gauge Station Locations

    Figure 5 Fall 2009 Water Level Groundwater Contours

    Figure 6 Fall 2010 Water Level Groundwater Contours

    Figure 7 Location of Key Wells with Hydrographs

    Figure 8 Groundwater Production in the Bunker Hill Basin in Appendix B

    Figure 9 Prediction Chart for Annual Change in Storage

    Figure 10 Estimate of Production for Current Water Year

    Figure 11 Estimate of Production for Ensuing Water Year

    9 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin iv

    Tables

    Table 1 Summary of Percentage of Normal Precipitation

    Table 2 Change in Groundwater Levels in Key Wells

    Table 3 Annual Change in Storage for the Bunker Hill Basin

    Table 4 Accumulated Change in Storage for Bunker Hill Basin (1987 to 2004)

    Table 5 Production for Sub-basins of Bunker Hill Basin

    Table 6 Estimates of Percentage of Normal Precipitation for Current Water Year

    Table 7 Average Annual Change in Storage for the Bunker Hill Basin

    Table 8 Summary of Surface Distribution Water for the Bunker Hill Basin

    10 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin v

    Appendices

    Appendix A Water Level Elevations for the Bunker Hill Basin

    Appendix B Hydrographs for Key Wells

    Appendix C Production Data for the Preceding Water Year

    Appendix D Historic Annual Precipitation

    11 of 151

  • Engineering Investigation of the

    Bunker Hill Basin 2010-2011

    Executive Summary

    Executive Sum

    mary

    12 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 1

    1.0 Executive Summary

    Article 1, Section 75560 of the California Water Code requires that a Water Conservation

    District that proposes to levy a groundwater charge shall annually cause to be made

    an engineering investigation and report upon groundwater conditions of the District. In

    accordance with these requirements, the San Bernardino Valley Water Conservation

    District (District) must make the following findings and determinations as they relate to

    the ground and surface water conditions of the Bunker Hill Basin and those areas within

    the District boundary. Refer to Figure 3 for locations.

    Task 1. Annual change in storage for the Bunker Hill Basin for the preceding water year

    (Fall 2009 to Fall 2010);

    Task 2. Accumulated change in storage of the Bunker Hill Basin as of the last day of

    the preceding water year (June 30, 2010);

    Task 3. Total groundwater production from the Bunker Hill Basin for the preceding

    water year (July 1, 2009 - June 30, 2010);

    Task 4. Estimate of the annual change in the Bunker Hill Basin storage for the current

    water year (July 1, 2010 - June 30, 2011);

    Task 5. Estimate of the annual change in the Bunker Hill Basin storage for the ensuing

    water year (July 1, 2011 - June 30, 2012);

    Task 6. Average annual change in Bunker Hill Basin storage for the immediate past

    ten water years (2000 - 2010);

    Task 7. Estimated amount of agricultural water and other than agricultural water to be

    withdrawn from the groundwater supplies of the District for the ensuing water

    year (July 1, 2011 - June 30, 2012);

    Task 8. Estimated amount of water necessary for surface distribution for the ensuing

    water year for the Bunker Hill Basin and the District (July 1, 2011 - June 30,

    2012); and

    13 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 2

    Task 9. The amount of water that is necessary for the replenishment of the

    groundwater supplies of the Bunker Hill Basin and the District for the ensuing

    water year (July 1, 2011 - June 30, 2012).

    To make the findings and determinations listed above, District staff researched available

    hydro-geologic and engineering data for the Bunker Hill Basin. These data were

    compiled and analyzed and a predictive relationship between precipitation, production,

    and change in basin storage. This relationship was based on empirical data since 1993

    and enables the prediction of change in storage, given certain annual production and

    precipitation levels. In addition, annual and accumulated change in storage values were

    calculated based on current and historic water level changes throughout the Bunker Hill

    Basin.

    Based on 20 measuring stations, precipitation throughout the contributing watershed

    was 92% of normal for the period October 1, 2008 to September 31, 2009.

    The required findings for the 2011 Engineering Investigation are provided below. Each

    of the tasks is further explained in the main body of the report. Throughout this

    document a positive sign (+) denotes an increase in groundwater storage or

    groundwater level elevation while a negative sign (-) denotes a decrease in groundwater

    storage or groundwater level elevation.

    Section 75574 of the California Water Code requires that the District Board indicate the

    amount of water the District is obligated by contract to purchase. The San Bernardino

    Valley Water Conservation District is not required by contract to purchase any water.

    14 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 3

    Summary of Findings for the 2011 Engineering Investigation

    Task 1. Annual change in storage for the Bunker Hill Basin for the preceding water

    year (July 1, 2009 to June 30, 2010 groundwater levels)

    Change in storage between Fall 2009 and Fall 2010

    56,977 acre-ft (increase)

    The amount of water stored in the Basin increased by 56,977 acre-feet between 2009 and 2010.

    Task 2. Accumulated change in storage of the Bunker Hill Basin as of the last day of

    the preceding water year (2010)

    Accumulated change in storage between July 1993 and June 2010.1

    -340,623 acre-ft (decrease)

    The amount in storage in the Summer of 2010 is -340,623 acre-ft less than in the Summer of 1993.

    Task 3. Total groundwater production from the Bunker Hill Basin for the preceding

    water year (July 1, 2009 - June 30, 2010)

    214,025.47 acre-ft

    1 In the Districts Engineering Investigation (EI) prior to 1993-94, the accumulated change in storage was based on the basin storage in 1984 as considered full. A concern arose regarding the flooding of basements due to high groundwater levels in the Pressure Zone of the Bunker Hill Basin. Therefore, in response to the City of San Bernardinos comments on accumulated change in storage, all EIs since that time are based on 1993 basin storage levels considered as full.

    15 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 4

    Task 4. Estimate of the annual change in the Bunker Hill Basin storage for the current

    water year (July 1, 2010 - June 30, 2011)

    -22,458 acre-ft (decrease)

    The amount of water in the Basin is estimated to decrease by 22,458 acre- ft during the current water year.

    Task 5. Estimate of the annual change in the Bunker Hill Basin storage for the ensuing

    water year (July 1, 2011 - June 30, 2012)

    -19,158 acre-ft (decrease)

    The amount of water in the Basin is estimated to decrease by 19,158 acre-ft during the ensuing water year.

    Task 6. Average annual change in Bunker Hill Basin storage for the immediate past 10

    water years (2000-2010) shows a continual decrease, although less in

    magnitude than previous years:

    -19,602 acre-ft (decrease)

    Task 7. Estimated amount of agricultural water and other than agricultural water to be

    withdrawn from the groundwater supplies of the District for the ensuing water

    year (July 1, 2011 - June 30, 2012)

    Estimated amount of agricultural water withdrawn from the

    groundwater supplies within the District boundary for the ensuing

    water year (July 1, 2011 - June 30, 2012)

    10,247 acre-ft

    16 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 5

    Estimated amount of other than agricultural water withdrawn from

    the groundwater supplies of the District for the ensuing water year

    (July 1, 2011 - June 30, 2012)

    33,429 acre-ft

    Task 8. Estimated amount of water necessary for surface distribution for the ensuing

    water year for the Bunker Hill Basin and the District (July 1, 2011 - June 30,

    2012)

    Estimated amount of water necessary for surface distribution for

    the ensuing water year (July 1, 2011 - June 30, 2012) for the

    Bunker Hill Basin

    80,452 acre-ft

    Estimated amount of water necessary for surface distribution for

    the ensuing water year (July 1, 2011 - June 30, 2012)

    within the District boundary

    68,040 acre-ft

    Task 9. The amount of water which is necessary for the replenishment of the

    groundwater supplies of the Bunker Hill Basin and the District for the ensuing

    water year (July 1, 2011 - June 30, 2012)

    The amount of water which is necessary for the replenishment of

    the groundwater supplies of the Bunker Hill Basin for the ensuing

    water year (July 1, 2011 - June 30, 2012)

    162,067 acre-ft

    17 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 6

    The amount of water which is necessary for the replenishment of

    the groundwater supplies within the District boundary for the

    ensuing water year (July 1, 2011 - June 30, 2012)

    62,834 acre-ft In addition to the above findings, Section 75505 of the California Water Code requires

    that a finding be made as to the amount of water necessary to be replaced in the intake

    areas of the groundwater basins within the District to prevent the landward movement of

    salt water into the fresh groundwater body, or to prevent subsidence of the land within

    the District. Because of its location and the elevations of its water table, the Bunker Hill

    Basin is not subject to salt-water intrusion and the current groundwater levels do not

    indicate any significant land subsidence.

    Section 75540 of the California Water Code requires that the District Board establish a

    zone or zones where a groundwater charge is to be implemented. The Code specifically

    states that a single zone may include the entire District and in May 1993 the Board

    established the entire District as one zone. This determination may be amended in the

    future, but lacking any evidence to the contrary, in the 2010-11 year the entire District

    will remain as a single zone in regard to any groundwater charge.

    Section 75561 of the California Water Code further requires the Engineering

    Investigation to include a finding related to the amount of water the District is obligated

    by contract to purchase. At this time the District has no contractual obligation to

    purchase water for the replenishment of the groundwater supplies. However, instead

    cooperates with local and regional agencies to recharge the aquifer. The District works

    with San Bernardino Valley Municipal Water District (Valley) to spread excess allocation

    State Project Water in the Districts spreading basins. In the past the District has utilized

    reserves to offset the cost of water purchases which have spread in its basins. Due to

    the significant reduction in District reserves it has not purchased water this year.

    18 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 7

    Based on the results of the 2009 Engineering Investigation, the San Bernardino Valley Water Conservation District finds that:

    Due to the imbalance between groundwater recharge and production since 1993,

    the Bunker Hill Basins storage is 351,544 acre-feet below that which is

    considered full for purposes of this investigation. This value is less than 2010

    report due to local rainfall rates and management of the basin.

    During the ensuing water year (July 1, 2011 - June 30, 2012), the Bunker Hill

    Basin could be recharged, with up to 525,148 acre-feet of water. This recharge

    quantity would be needed to attain the 1993 storage level that is considered full.

    The Basin Technical Advisory Committee (BTAC) recommends a maximum of

    125,000 acre-feet to safely manage and recharge the basin. This amount

    includes 68,000 acre-ft in Mill Creek and Santa Ana River Basins.

    The District must continue to take all necessary steps to maintain and enhance

    its capability to conduct recharge operations. These steps may include

    maintenance and repair of existing, diversion facilities, canals, dikes, basins,

    roads, and other water recharge facilities. These improvements are required to

    ensure that the increasing demands on the Basin, especially during drought

    periods, can be met.

    The District should continue to work cooperatively in the collaborative planning

    for the Enhanced Recharge Program to plan, design, build and maintain facilities

    to expand the capabilities for recharge of waters that are developed as a result of

    water conservation due to the construction of Seven Oaks Dam (SOD).

    The District has begun collaborative construction efforts with Valley to improve

    the capacities and delivery capabilities of the Districts Upper Santa Ana River

    diverted water conveyance canals and spreading basins. The District should

    review the assumed single zone of influence/benefit in 2011-2012 and revise if

    needed.

    19 of 151

  • Engineering Investigation of the

    Bunker Hill Basin 2010-2011

    Engineering Investigation

    Engineering

    Investigation

    20 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 8

    2.0 Introduction

    The 2010-2011 Engineering Investigation (EI) is being presented with a number of

    changes compared to previous EI Reports. The report uses as the basis of calculation

    the 2005-2006 Report however updates the document as proposed in the work plan

    prepared and circulated in November 2010. This approach also includes close

    coordination with other groups particularly San Bernardino Valley Municipal Water

    District (SBVMWD) who do their own calculations for elements of the EI Report. We

    believe this approach makes the best use of the resources of all water entities within the

    basin. This years report provides more research, source documentation, and

    summary displaying of surface and groundwater activities within the Bunker Hill Basin

    and specifically within the Water Conservation Districts boundaries compared to prior

    years.

    Additional changes in this years report include:

    Additional explanation has been provided to support the conclusions in each section of

    the report. Additionally, background has been provided to assist with making the

    engineering terminology more understandable and clearer summaries of the results

    reported.

    2.1 Purpose and Scope

    The San Bernardino Valley Water Conservation District (District) was created by a vote

    of the people in 1931 for the purpose of managing the recharge activities that were

    previously conducted by the Water Conservation Association. The Water Conservation

    Association was incorporated in 1909 and had been diverting flows from the Santa Ana

    River for groundwater recharge since 1911. Currently the District has ownership, as well

    as easements and/or use of properties owned by the Bureau of Land Management

    (BLM), on a total of 3,735 acres within the Santa Ana River and Mill Creek Wash areas.

    The District boundary covers an area of approximately 50,000 acres, which represents

    about 60% of the Bunker Hill Basin. Figure 1 displays the project area map for the

    21 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 9

    Engineering Investigation. It includes the District boundary along with its location

    relative to the County and State boundaries.

    Article 1, Section 75560 of the California Water Code requires that a Water Conservation

    District that proposes to levy a groundwater charge shall annually cause to be made

    an engineering investigation and report upon groundwater conditions of the District. In

    accordance with these requirements, the San Bernardino Valley Water Conservation

    District (District) must make the following findings and determinations as they relate to

    the ground and surface water conditions of the Bunker Hill Basin and those areas within

    the District boundary.

    22 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 10

    Task 1. Annual change in storage for the Bunker Hill Basin for the preceding water year

    (Fall 2009 to Fall 2010);

    Task 2. Accumulated change in storage of the Bunker Hill Basin as of the last day of

    the preceding water year (June 30, 2009);

    Task 3. Total groundwater production from the Bunker Hill Basin for the preceding

    water year (July 1, 2009 - June 30, 2010);

    Task 4. Estimate of the annual change in the Bunker Hill Basin storage for the current

    water year (July 1, 2010 - June 30, 2011);

    Task 5. Estimate of the annual change in the Bunker Hill Basin storage for the ensuing

    water year (July 1, 2011 - June 30, 2012);

    Task 6. Average annual change in Bunker Hill Basin storage for the immediate past 10

    water years (2000-2010);

    Task 7. Estimated amount of agricultural water and other than agricultural water to be

    withdrawn from the groundwater supplies of the District for the ensuing water

    year (July 1, 2011 - June 30, 2012);

    Task 8. Estimated amount of water necessary for surface distribution for the ensuing

    water year for the Bunker Hill Basin and the District (July 1, 2011 - June 30,

    2012); and

    Task 9. The amount of water that is necessary for the replenishment of the

    groundwater supplies of the Bunker Hill Basin and the District for the ensuing

    water year (July 1, 2011 - June 30, 2012).

    To make the findings and determinations listed above, District staff researched available

    hydrogeologic, precipitation, and engineering data for the Bunker Hill Basin and

    surrounding areas. These data were compiled and analyzed and a predictive

    relationship between precipitation, production, and change in basin storage was adapted

    from similar relationships developed by Geoscience Support Services in the preparation

    of previous Engineering Investigations. This relationship was based on empirical data

    enables the prediction of change in storage, given certain annual production and

    precipitation levels. In addition, annual and accumulated change in storage was

    calculated based on historic water level changes throughout the Bunker Hill Basin.

    23 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 11

    2.2 Location, Topography and Climate

    The Bunker Hill Basin is located at the top of the Santa Ana River Watershed and

    receives all the surface water runoff from the headwaters of the Santa Ana River, Mill

    Creek, and a portion of that from the Lytle Creek area as well as smaller periodic flows

    from Plunge, City, Devil Canyon, Cajon and Elder Creeks. It is part of the inland valley

    called the San Bernardino Valley located in San Bernardino County, California and

    encompasses approximately 89,600 acres. Once past the Bunker Hill Basin, the Santa

    Ana River continues to flow southwesterly for approximately 60 miles until it reaches the

    Pacific Ocean.

    The Bunker Hill Basin is bounded on the northwest by the San Gabriel Mountains, on the

    northeast by the San Bernardino Mountains, on the south by the Crafton Hills and the

    Badlands, and on the southwest by a low east-facing escarpment produced by the San

    Jacinto fault. These geologic features are easily identified on Figure 5 and Figure 6.

    The major streams providing inflows and outflows for the Bunker Hill Basin are provided

    on Figure 1. The United States Geological Survey (USGS) administers stream flow gauging stations on all of these waterways except Mill Creek. Mill Creek flow is

    assumed to be 56% of the Santa Ana River flow based on historic data. Total diversions

    for direct use and recharge on the Santa Ana River may exceed the stream flows due to

    measurements by different agencies.

    The Bunker Hill Basin is also expressed by a large group of City and Water Agencies

    that are working to increasingly collaborate for improved transparency. Figure 2 presents an overview of the Water Agency Jurisdictions with an overlay of City

    boundaries.

    The climate in the region is a semi-arid Mediterranean-type characterized by long dry

    summers and relatively short mild winters. The annual average temperature in the

    valley is 62 F, with extremes ranging from as low as 18 F to as high as 116 F

    (Burnham and Dutcher, 1960). Precipitation in the region is highly variable depending

    on location and elevation. Historical annual averages range from 11 inches near Loma

    24 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 12

    Linda Fire Department located at the southwest end of the basin to over 41 inches at the

    Lake Arrowhead located at the upper end of the mountain watershed contributing flow to

    the basin. Precipitation data provided by the Water Resources Division for 20 stations

    are summarized in Table 1 and displayed on Figure 4.

    2.3 Definition of Terms

    For the purposes of this report, the following terms are defined:

    Bunker Hill Basin - The Bunker Hill Basin is the groundwater basin that underlies the

    San Bernardino Valley. By strict definition according to (Dutcher and Garrett, 1963),

    the Bunker Hill Basin is separate from the Lytle Groundwater Basin, but receives

    groundwater underflow from the Lytle Basin. However, for completeness, the

    definition of the Bunker Hill Basin is extended to include the Lytle Basin for the

    purposes of this report.

    Production - The term production includes extraction of water by groundwater

    pumping from wells and surface diversions from the Santa Ana River, Mill Creek,

    City Creek, Devil Canyon Creek, Cajon Creek, Plunge Creek, and Lytle Creek.

    Preceding Water Year - As per the California Water Code, the preceding water year

    is the period July 1, 2009 through June 30, 2010.

    Current Water Year - As per the California Water Code, the current water year is the

    period July 1, 2010 through June 30, 2011.

    Ensuing Water Year - As per the California Water Code, the ensuing water year is

    the period July 1, 2011 through June 30, 2012.

    25 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 13

    2.4 Sources of Data

    Data used in the development of this engineering investigation were obtained from a

    variety of sources including public and private agencies. The data analysis tasks

    involved tabulating and summarizing information from documented and undocumented

    reports, public and private files, and personal communication with local, State, and

    Federal agencies. Some of the more important data sources are listed below.

    Data for Fall 2009 and Fall 2010 groundwater elevations and preceding water year (July

    2009 to June 2010) production were obtained from the primary water purveyors in the

    Bunker Hill Basin including:

    City of Colton

    City of Loma Linda/Loma Linda University

    City of Redlands

    City of Rialto

    City of Riverside

    City of San Bernardino

    East Valley Water District

    Elsinore Valley Municipal Water District/Meeks and Daley Water Company

    Fontana Water Company

    Gage Canal Company

    Riverside Highland Water Company

    San Bernardino County Department of Transportation and Flood Control

    Southern California Edison

    San Bernardino Valley Municipal Water District

    Watermaster Support Services, Steve E. Mains

    West Valley Water District

    United States Geological Survey, Santee, CA Office

    26 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 14

    Data regarding historic diversions from the Santa Ana River, Mill Creek, Plunge Creek,

    City Creek, Devil Canyon Creek, Cajon Creek, and Lytle Creek were obtained from the

    following sources:

    San Bernardino Valley Water Conservation District (acting as Project

    Manager for the Cooperative Water Project - Exchange Plan)

    Western Municipal Water District

    City of San Bernardino

    Historic precipitation data were obtained from the following sources:

    San Bernardino County Department of Transportation and Flood Control

    Redlands Daily Facts

    Big Bear Grizzly

    Current precipitation data is downloaded from USGS stations.

    27 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 15

    3.0 Fall 2009 Groundwater Elevation Contours

    The District, the Western Municipal Water District, and the primary water purveyors in

    the Bunker Hill Basin provided Fall 2009 and 2010 water level data. Static groundwater

    elevations for wells throughout the Bunker Hill Basin are compiled in Appendix A. These elevations were plotted for 184 wells using a Geographic Information System

    (GIS) are plotted in Figures 5 & 6 for Fall 2009 and Fall 2010. The water elevation values were used to derive an interpolated surface for the extent of the Bunker Hill

    Basin. For purposes of comparison, Fall 2009 and Fall 2010 static groundwater elevation

    surface contours are provided in Figures 5 & 6 Fall 2009 and Fall 2010.

    4.0 Task 1 - Annual Change in Storage (Fall 2009 to Fall 2010)

    4.1 Hydrologic Sub-areas

    Using a Geographic Information System, the average groundwater elevation changes

    were determined for each of the eight hydrologic sub-areas shown in Figure 3 and listed below.

    Bunker Hill I - Southwest of Interstate 215

    Bunker Hill I - Northeast of Interstate 215

    Bunker Hill II - West of Mentone Fault

    Bunker Hill II - East of Mentone Fault

    Lytle Basin - Southeast of Barrier J

    Lytle Basin - Northwest of Barrier J

    Pressure Zone - North of Santa Ana Wash

    Pressure Zone - Santa Ana Wash

    Due to variations of changes in groundwater level elevation, the Bunker Hill II - East of

    Mentone Fault was further subdivided into Storage Units North of Redlands Fault and

    Southeast of Redlands Fault. These Storage Units are also shown in Figure 6.

    28 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 16

    Qchange in storage = Ai x Si x hi where:

    Qchange in storage = Annual change in storage for the Bunker Hill Basin, (acre-feet)

    Ai = Area of sub-area and storage unit i, (acres)

    Si = Storativity of sub-area and storage unit i

    hi = Average water level change of sub-area and storage unit i, (feet)

    4.2 Area and Storativity

    Digitizing each polygon made estimates of the area extent of the sub-areas and storage.

    Average storativity for each sub-area was determined based on data from Hardt and

    Hutchinson, 1980. Both of these values are shown in Table 3. Storativity values ranged from 0.02 for the Pressure Zone - North of the Santa Ana Wash to 0.13 for the Lytle

    Basin - Northwest of Barrier J and Bunker Hill II - East of the Mentone Fault.

    4.3 Groundwater Level Elevation Changes

    In order to determine the annual change in storage for the Bunker Hill Basin, Fall 2010

    groundwater level elevation data were compared with the same from Fall 2009.

    Measurements for 210 wells were available for both periods and the differences are

    provided in Appendix A.

    Average changes in groundwater were determined by averaging the changes for all

    wells in each of the eight sub-areas and storage units as shown in Table 3.

    4.4 Change in Groundwater Storage

    The total annual change in storage for the Bunker Hill Basin was determined by

    summing the changes from each sub-area. Changes in groundwater storage for the

    period Fall 2009 to Fall 2010 for the Bunker Hill Basin were calculated using the

    following formula:

    29 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 17

    As shown in Table 3, the change in groundwater storage for the Bunker Hill Basin between Fall 2009 and Fall 2010 was a increased of 56,977 acre-ft.

    5.0 Task 2 - Accumulated Change in Storage from Fall 1993 to Fall 2010

    For purposes of this report, the accumulated change in storage as of the last day of the

    preceding water year (September 30, 2010) was based on the changes in water levels

    between Fall 1993, when the accumulated basin change in storage was considered

    zero, and the Fall of 2010.2 The accumulated change in storage as of June 30, 2010

    was determined by adding the change in storage for the preceding water year (July 1,

    2010 to June 30, 2011) of 56,977 determined in Section 4.4, to the accumulated change

    in storage as of June 30, 2009 (-397,600). The result of this calculation is an

    accumulated decrease in storage for the Bunker Hill Basin of -340,623 acre-ft.

    Table 4 summarizes the accumulated change in storage of the Bunker Hill Basin for the period 1988 to 2010 based on 1993 as the zero accumulated storage year. As would

    be expected, storage generally increases with above average rainfall and decreases

    with normal and below average rainfall.

    2 In the Districts Engineering Investigation (EI) prior to 1993-94, the accumulated change in storage was based on the basin storage in 1984 as considered full. A concern arose regarding the flooding of basements due to high groundwater levels in the Pressure Zone of the Bunker Hill Basin. Therefore, in response to the City of San Bernardinos comments on accumulated change in storage, all EIs since that time are based on 1993 basin storage levels considered as full.

    30 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 18

    6.0 Task 3 - Total Groundwater Production for the Preceding Water Year (July 1, 2009 to June 30, 2010)

    Production data for the preceding water year (July 1, 2009 to June 30, 2010) for the

    Bunker Hill Basin were obtained from the primary water purveyors as listed in Section

    2.4. Production data for wells owned by some smaller water agencies were included if

    data was available from the Western-San Bernardino Watermaster, Western Municipal

    Water District and semiannual billing statements issued by the District.

    Appendix C shows the production for each groundwater well in the Bunker Hill Basin for the period July 2009 through June 2010. As summarized on the last page of the

    Appendix, groundwater production from the Bunker Hill Basin for the preceding water

    year was approximately 214,025 acre-ft. Table 5 summarizes the Bunker Hill Basin groundwater production for each of the sub-areas defined in Section 4.1.

    Groundwater production within the Bunker Hill Basin during the period July 2009 through

    June 2010 is shown on Figure 8. The Pressure Zone has the greatest density of higher producing facilities with pockets of substantial production scattered throughout the rest

    of the basin.

    31 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 19

    7.0 Task 4 - Estimate of the Annual Change in Storage for the Current Water Year (July 1, 2010 to June 30, 2011)

    To estimate annual change in storage for the current water year, a multiple regression

    analysis was performed for the period between 1991-92 and 2004-05 for three

    parameters.

    Annual Change in Storage

    Precipitation

    Production

    In Engineering Investigations (EI) prior to 1998, data for the period 1982 calendar year

    through 1991 calendar year were also utilized in the regression analysis. The only

    production data available for this time frame was based on a calendar year period

    instead of the June to July period required in the EI. Since the 1991-92 period, more

    accurate and more complete production data for the July to June period has become

    available, as the District has compiled detailed information for its EI. Since 1998, the

    regression analysis has not included pre-1991 data to more accurately represent June

    through July production.

    Annual change in storage for the current water year is estimated using the following

    relationship between change in storage, precipitation, production, and the calculated

    regression coefficients. The accumulated change in storage is shown in Figure 10.

    32 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 20

    A nomograph, constructed using the above equation, is shown on Figure 9. Through the use of this chart or the equation above, annual change in storage can be estimated

    for a given set of annual precipitation and production values. The precipitation used in

    the nomograph is based on the average of the representative Bunker Hill Basin drainage

    area stations listed in Table 6. The historic annual precipitation information is show in Table 1.

    The average annual precipitation for eight of the ten stations with recent data is shown in

    Table 6 approximately 20.8 inches, while the total for the preceding water year was 20.8 inches (107 percent of normal). Historic annual precipitation values are plotted in

    Appendix D for these eight stations and twelve other local stations.

    Table 6 shows that for the period between July 1, 2009 and December 31, 2009, precipitation was 80 percent of normal for the eight stations with data. Remainder of the

    water year, January 1 to June 30, 2010, the rainfall averaged 105% of the long term

    average. Annually, precipitation for the 2009-10 water year averaged 98%. For

    purposes of this report, it was assumed that precipitation for the current water year (July

    1, 2011 to June 30, 2012) would be average the current water year compared to normal

    or 20.4 inches. Therefore, precipitation for the ensuing water year (July 1, 2011 to June

    30, 2012) was estimated to be 100 percent of normal or 20.8 inches of rainfall.

    Based on these assumptions, the estimated production for the current water year will be

    approximately 223,565 acre-ft as shown in Figure 10. Using this result in Figure 9 an estimated change in storage for the current water year (July 2010 to June 2011) of

    22,457 acre-ft was determined.

    QAnnual storage = 131730+7620Qprec0.207Qprodwhere:

    Q Annual storage = Annual change in storage, (acre-feet) Qprec = Annual Precipitation, inches Qprod = Annual Production, acre-feet

    33 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 21

    8.0 Task 5 - Estimate of the Annual Change in Storage for the Ensuing Water Year (July 1, 2011 to June 30, 2012)

    The annual change in storage for the ensuing water year (July 1, 2011 to June 30, 2012)

    was estimated using the same method as described in Section 7.0. It was assumed that

    precipitation for the ensuing water year would be 100% of normal or 20.8 inches. Based

    on this assumption, the estimated production for the ensuing water year will be

    approximately 223,361 acre-ft as shown in Figure 11. Again, using this result in the nomograph shown in Figure 9, the estimated annual change in storage for the ensuing water year (July 1, 2011 to June 30, 2012) is 19,158 acre-ft.

    9.0 Task 6 - Average Annual Change in Storage for the Immediate Past 10 Water Years

    Table 7 shows the average annual change in storage for the immediate past ten water years (July 2000 to June 2010) using the same method as described in Section 4.0. By

    summing the average annual change in storage for each sub-area, a total average

    annual change in storage for the Bunker Hill Basin for the immediate past ten water

    years was determined to be 19,602 acre-feet/year.

    10.0 Task 7 - Estimated Amount of Agricultural Water and Other Than Agricultural Water to be Withdrawn for the Ensuing Water Year (July 1, 2011 to June 30, 2012)

    The estimated amount of agricultural water and other than agricultural water to be

    withdrawn within the District for the ensuing water year (July 1, 2011 to June 30, 2012)

    was based on the following equations:

    34 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 22

    Data on agricultural use and other uses within the District for the preceding water year

    (July 1, 2009 to June 30, 2010) are provided in Appendix C. For the period July 1, 2009 through June 30, 2010 approximately 14,119 acre-ft of groundwater was produced for

    agricultural applications within the District boundary. For the same period,

    approximately 46,064 acre-ft of groundwater was produced for all other uses within the

    District boundary. Using the equations presented above with the following values

    inserted:

    Qagr(09-10) = Qagr(09-10) x [(Qtotal(11-12) - Qsurf(11-12)) / (Qtotal(09-10) - Qsurf(09-10))] and

    Qnon-agr(09-10) = Qnon-agr(09-10) x [(Qtotal(11-12) - Qsurf(11-12)) / (Qtotal(09-10) - Qsurf(09-10))]

    where:

    Qagr(11-12) = Agricultural use within the District for the ensuing water year, acre-ft

    Qagr(09-10) = Agricultural use within the District for the preceding water year, acre-ft (Appendix C)

    Qtotal(11-12) = Production (including surface diversion) from the Bunker Hill Basin for the ensuing water year, acre-ft (Figure 13)

    Qtotal(09-10) = Production (including surface diversion) from the Bunker Hill Basin for the preceding water year, acre-ft (Appendix C)

    Qnon-agr(11-12) = All other uses within the District for the ensuing water year, acre-ft

    Qnon-agr(09-10) = All other uses within the District for the preceding water year, acre-ft (Appendix C)

    Qsurf(11-12) = Surface diversions from the Bunker Hill Basin for the ensuing water year, acre-ft (Table 8)

    Qsurf(09-10) = Surface diversions from the Bunker Hill Basin for the preceding water year, acre-ft (Appendix C)

    35 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 23

    Qagr(09-10) = 14,119 acre-ft (Appendix C)

    Qtotal(11-12) = 223,361 acre-ft (Figure 13

    Qtotal(09-10) = 294,478acre-ft (Appendix C)

    Qnon-agr(09-10) = 46,064 acre-ft (Appendix C)

    Qsurf(11-12) = 68,040 acre-ft (Task 8)

    Qsurf(09-10) = 80,452 acre-ft (Table 8)

    The estimated production within the District for the ensuing water year for agricultural

    uses and other than agricultural uses is:

    Qagr(11-12) = 14,119 x [(223,361 68,040) / (294,478 80,452)] = 10,247 acre-ft

    Qnon-agr(11-12) = 46,046 x [(223,361 68,040) / (294,478 80,452)] = 33,429 acre-ft

    Qagr(11-12) = 10,247 acre-ft

    Qnon-agr(11-12) = 33,429 acre-ft

    QDist(11-12) = 43,676acre-ft

    By summing these two results, it is estimated that 39,140 acre-feet of groundwater will

    be withdrawn within the District for the ensuing water year (July 1, 2010 to June30,

    2011). Appendix C shows the Agriculture and Non-Agriculture trends for the District by sub-basin using approximately 243 wells within the District Boundary reporting type of

    use.

    36 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 24

    11.0 Task 8 - Estimated Amount of Water for Surface Distribution for the Ensuing Water Year (July 1, 2011 to June 30, 2012)

    The amount of water for surface distribution for the ensuing water year (July 1, 2011 to

    June 30, 2012) was estimated based on the average surface diversions for the Santa

    Ana River, Mill Creek, and Lytle Creek for the period 1985 to 2010.

    As shown in Table 8, average surface diversions for the Santa Ana River, Mill Creek, Lytle Creek and smaller tributary creeks collectively called Bunker Hill Creeks, between

    1985 and 2010 were 39,616, 28,424, 11,771, and 641 acre-feet, respectively.

    Therefore, the total estimated amount of water for surface distribution from the Bunker

    Hill Basin for the ensuing water year (July 1, 2011 to June 30, 2012) is found by

    summing the diversions as follows:

    Bunker Hill Surface Distribution = 39,616 +28,424 +11,771 +641 = 80,452 acre-ft

    As Lytle Creek and Bunker Hill Creeks are not within the District, the estimated amount

    of surface distribution from the District for the ensuing water year (July 1, 2011 to June

    30, 2012) is the sum of the Santa Ana River and Mill Creek distributions.

    District Surface Distribution = 39,616 + 28,424 = 68,040 acre-ft

    12.0 Task 9 - Estimated Amount of Water for Replenishment of the Groundwater Supplies for the Ensuing Water Year (July 1, 2011 to June 30, 2012)

    The amount of water necessary for replenishment of the groundwater supplies of the

    Bunker Hill Basin for the ensuing water year (July 1, 2011 to June 30, 2012) was

    estimated based on:

    Replenishment = Total Production - Surface Diversions - Change in Storage

    37 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 25

    The estimated production and surface diversions from the Bunker Hill Basin for the

    ensuing water year (July 1, 2011 to June 30, 2012) were estimated at approximately

    223,361 acre-feet (from Figure 13) and 80,452 acre-feet (from Table 8), respectively. The estimated change in storage determined in Section 8.0 and shown on Figure 9 is a decrease of 19,158 acre-feet. Therefore, the amount of water necessary for

    replenishment of the groundwater supplies of the Bunker Hill Basin is estimated as

    follows:

    Replenishment = 223,361 80,452 + 19,158 = 162,067 acre-ft

    The amount of water necessary for replenishment of the Districts groundwater supplies

    for the ensuing water year (July 1, 2011 to June 30, 2012) was estimated using the

    same equation as shown above and substituting values for the District area. The

    estimated production within the District for the ensuing water year was estimated at

    approximately 43,676 acre-ft (from Section 10.0) and 68,040 acre-ft (from Section 11.0),

    respectively. The change in storage for the ensuing water year for the District was

    estimated as a decrease of 19,158 acre-ft (assumed to be half of the Bunker Hill Basin).

    Therefore, the amount of water necessary for replenishment of the Districts groundwater

    supplies for the ensuing water year (July 1, 2011 to June 30, 2012) is:

    Replenishment = Total Production - Surface Diversions - Change in Storage

    Replenishment = (43,676 + 68,040) 68,040 + 19,158 = 62,834 acre-ft

    13.0 General Findings In addition to the above findings, Section 75505 of the California Water Code requires

    that a finding be made as to the amount of water necessary to be replaced in the intake

    areas of the groundwater basins within the District to prevent the landward movement of

    salt water into the fresh groundwater body, or to prevent subsidence of the land within

    the District. Because of its location and the elevations of its water table, the Bunker Hill

    Basin is not subject to salt-water intrusion and the current groundwater levels will not

    (lowest=985 msl) result in any significant land subsidence.

    38 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 26

    Section 75540 of the California Water Code requires that the District Board establish a

    zone or zones where a groundwater charge is to be implemented. The Code specifically

    states that a single zone may include the entire District and in May 1993 the Board

    established the entire District as one zone. This determination may be amended in the

    future, but lacking any evidence to the contrary, in the 2009-10 year the entire District

    will remain as a single zone in regard to any groundwater charge.

    Section 75561 of the California Water Code further requires the Engineering

    Investigation to include a finding related to the amount of water the District is obligated

    by contract to purchase. At this time the District has no contractual obligation to

    purchase water for the replenishment of the groundwater supplies.

    14.0 Conclusions Based on the results of the 2011 Engineering Investigation, the San Bernardino Valley

    Water Conservation District finds that:

    Due to the imbalance between recharge and production since 1993, the Bunker

    Hill Basins storage is 340,623 acre-feet below that which is considered full for

    purposes of this Investigation.

    During the ensuing water year (July 1, 2011 to June 30, 2012), the Bunker Hill

    Basin can be recharged, from all sources, with 525,148 acre-feet of water. This

    recharge quantity is derived by algebraically adding together the accumulated

    deficit as of the end of the preceding water year with the estimated quantity

    needed to maintain the 1993 storage level considered full.

    The District should continue to take the necessary steps to work with its partners

    to enhance its capability to conduct recharge operations, which includes

    construction of new, or maintenance and repair of existing, diversion facilities,

    canals, dikes, basins, roads, and other water recharge facilities. These

    39 of 151

  • SBV Water Conservation District Engineering Investigation 2011 Bunker Hill Basin 27

    improvements are required to ensure that the increasing demands on the Basin,

    especially during drought periods, can be met.

    15.0 Financial Data

    The San Bernardino Valley Water Conservation District, in response to questions

    previously provided information about the groundwater charge in this section. The

    District will provide a complete budget as a companion document to this report.

    Any changes to the groundwater charge will not be reflected on the Districts financial

    reports as income until the fiscal year 2011 2012, as the first increment of the new

    charge is not billed until then.

    40 of 151

  • Engineering Investigation of the

    Bunker Hill Basin 2010-2011

    Figures

    Figures

    41 of 151

  • Project Area2009 - 2010

    Engineering Investigation Report

    22

    2215

    2291

    2210

    2260

    2266

    2238

    22138

    22330

    22210

    22210

    Muscoy

    Rialto

    Devore

    Colton Mentone

    Fontana

    Redlands

    Highland

    Blue Jay

    Bryn Mawr

    Crestline Twin Peaks

    Loma Linda

    Lytle Creek

    Bloomington

    San BernardinoEast Highlands

    Running Springs

    Arrowhead Highlands

    15

    10

    10

    215

    215

    215

    Figure 1

    State PlaneNAD 83, Zone V, feet10M DEM DWRData Sources:SBVWCD, CASIL, SBVMWD

    CitiesHighwaysMajor StreamsSBV Water Conservation District BoundaryBunker Hill Basin BoundaryBunker Hill Basin

    Engineering InvestigationMarch 2011

    Source: SBVWCD GISL. Pierce

    San Timoteo Cre ek

    S ant

    a An

    a

    River

    Santa Ana River

    Plunge Cr ee

    k

    Mi l l Creek

    City

    Cre

    ek

    War

    m Cr e

    ek

    Eas

    t Tw

    in C

    reek

    SAN BERNARDINO MOUNTAINS

    CRAFTON HILLS

    Dev

    il C

    any

    on C

    reek

    Cajon Creek

    Lytle CreekM:\SBVWCD\2010EI\EI2010Maps\Fig01ProjectArea.mxd (03/11)

    SAN GABRIEL MOUNTAINS

    0 0.9 1.8 2.70.45

    Miles

    42 of 151

  • Conservation District and Water Agency Boundaries2009 - 2010

    Engineering Investigation Report

    /

    /

    /

    /

    /

    /

    /

    /

    /

    /

    /

    /

    City of San Bernardino East Valley WD

    City of Redlands City of Colton

    West Valley WD

    Yucaipa Valley WD

    City of Rialto

    City of Loma Linda

    SB Valley Municipal WD

    Muscoy

    Devore

    Colton Mentone

    Fontana

    Redlands

    Blue Jay

    Bryn Mawr

    Crestline Twin Peaks

    Loma Linda

    Lytle Creek

    Bloomington

    San BernardinoEast Highlands

    Running Springs

    Arrowhead Highlands

    15

    10

    10

    215

    215

    215

    15

    10

    60

    30

    66

    38

    138

    330

    210

    210

    Figure 2

    State PlaneNAD 83, Zone V, feet10M DEM - DWR 2008Data Sources: 2010 -11SBVWCD, SBVMWD

    CitiesSBV Water Conservation District BoundaryBunker Hill Basin BoundaryWater Agency BoundariesHighwaysMajor Streams

    Seven Oaks Dam

    Engineering InvestigationMarch 2011

    Map Creation: SBVWCD GISL. Pierce

    San Timoteo Cre ek

    S ant

    a An

    a

    River

    Santa Ana River

    Plunge Cr e

    ek

    Mi l l Creek

    City

    Cre

    e k

    War

    m Cr e

    ekE

    ast T

    win

    Cre

    ek

    SAN BERNARDINO MOUNTAINS

    CRAFTON HILLS

    Dev

    il Ca

    nyo

    n C

    reek

    Cajon C

    reek

    Lytle Creek

    X:\SBVWCD\2011EI\EI2011Maps\Fig02_Project_Area.mxd (03/11)

    SAN GABRIEL MOUNTAINS

    0 1 2 30.5

    MilesCajon Creek

    43 of 151

  • Bunker Hill SubBasins2010 - 2011 Engineering Investigation Report

    /

    /

    /

    /

    /

    /

    /

    /

    /

    /

    /

    /

    Muscoy

    Rialto

    Devore

    Colton Mentone

    Fontana

    Redlands

    Highland

    Blue Jay

    Bryn Mawr

    Crestline Twin Peaks

    Loma Linda

    Lytle Creek

    Bloomington

    San BernardinoEast Highlands

    Running Springs

    Arrowhead Highlands

    15

    10

    10

    215

    215

    215

    15

    91

    10

    60

    30

    66

    38

    138

    330

    210

    210

    Figure 3

    State PlaneNAD 83, Zone V, feet10M DEM - DWR 2008Data Sources: 2010 -11SBVWCD, SBVMWD

    CitiesHighways

    Bunker Hill SubbasinsNAME

    Bunker Hill I Northeast of 215 FreewayBunker Hill I Southwest of 215 FreewayBunker Hill II East of Mentone Fault NorthBunker Hill II East of Mentone Fault SouthBunker Hill II West of Mentone FaultLytle Basin Northwest of Barrier JLytle Basin Southeast of Barrier JPressure Zone North of Santa Ana WashPressure Zone Santa Ana WashMajor Streams

    Seven Oaks Dam

    Engineering InvestigationMarch 2011

    Map Creation: SBVWCD GISL. Pierce

    San Timoteo Cre ek

    S ant

    a An

    a

    River

    Santa Ana River

    Plunge Cr ee

    k

    Mil l Creek

    City

    Cre

    e k

    War

    m Cr e

    ekEa

    st T

    win

    Cre

    ek

    SAN BERNARDINO MOUNTAINS

    CRAFTON HILLS

    Dev

    il Ca

    nyo

    n C

    reek

    Cajon Creek

    Lytle Creek

    M:\EIR\2011EI\EI2011Maps\Fig03_Subbasins.mxd (01/11)

    SAN GABRIEL MOUNTAINS

    0 1 2 30.5

    Miles

    Cajon Creek

    44 of 151

  • Precipitation Trends and Station LocationsJuly 2009 -June 2010Engineering Investigation Report

    /

    //

    /

    /

    /

    /

    /

    //

    /

    /

    Muscoy

    Rialto

    Devore

    Colton Mentone

    Fontana

    Redlands

    Highland

    Blue Jay

    Bryn Mawr

    Crestline Twin Peaks

    Loma Linda

    Lytle Creek

    Bloomington

    San BernardinoEast Highlands

    Running Springs

    Arrowhead Highlands

    15

    10

    10

    215

    215

    215

    15

    91

    10

    60

    30

    66

    38

    138

    330

    210

    210

    Figure 4

    State PlaneNAD 83, Zone V, feet10M DEM - DWR 2008Data Sources: 21 Active Gauging Stations2010

    Precipitation StationsPrecip09_10Monthly

    5.1

    JUL 09AUG 09SEP 09OCT 09NOV 09JAN 10FEB 10MAR 10APR 10MAY 10JUN 10

    CitiesBunker Hill BasinHighwaysMajor Streams

    Engineering InvestigationMarch 2011

    Map Creation: SBVWCD GISL. Pierce

    SAN BERNARDINO MOUNTAINS

    Cajon Creek

    M:\EIR\2011EI\EI2011Maps\Fig03_Subbasins.mxd (01/11)

    0 1 2 30.5

    Miles

    45 of 151

  • Water Elevation Contour Surface Fall 20092010-2011 Engineering Investigation Report

    22

    22

    22

    22

    22

    22

    22

    22

    22

    22

    22

    22#*

    #*

    #*

    #*#*

    #*#*

    #*

    #*

    #*

    #*#*#*

    #*#*

    #*

    #*#*#*

    #*

    #*#*

    #*#*

    #*

    #*

    #*#*

    #*

    #*#*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*#*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*#*#*

    #*

    #*#*

    #*#*

    #*

    #*#*

    #*

    #*

    #*

    #*

    #*#*

    #*

    #*

    #*#*

    #*

    #*#*

    #*#*#* #*

    #*

    #*

    #*

    #*

    #*#*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*#*

    #*#*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #* #*#*

    #*#*

    #*#*#*

    #*

    #*

    #*#*#*

    #*

    #*

    #*

    #*#*

    #*#*

    #*

    #*#*

    #*

    #*

    #*

    #*#*

    #* #* #*

    #*

    #*#*#*

    #*#*#*

    #*#*#*

    #*#*#*#*

    #*#*#*#*#*

    #*#*

    #*#*#*#*#*#*

    #*

    #*

    #*#*

    #*#* #*

    #*

    #*

    #*

    #*

    #*#*

    #*

    #* #*

    #*#*

    #*#*#*#*#*

    #*#* #*

    #*

    #*

    #*

    #*#*#*#*

    #*

    #*

    #*

    #*

    #*

    #*#*

    #*#*

    #*

    #*

    #*

    #*#*

    #*

    #*

    #*

    #*#*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*#*#*

    #*

    #*

    #*

    #*#* #*

    #*

    #*

    #*

    #*#*

    #*#*

    #*#*#* #*#*

    #*

    #*#*

    #*#*

    #*

    #*

    #*#*#*#*#*#*#*#*

    #*#*#*

    #*

    #*

    #*#*

    #*#*

    #*#*#*

    #*

    #*

    #*#*

    #*#*

    #*#*#*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*#*#* #*#*

    #*

    #*

    #*

    #*

    #*#*

    #*

    #*

    #*

    #*

    #*

    #*#*#*#*#*#*

    #*

    #*

    #*#*

    #* #*#*

    Muscoy

    Rialto

    Devore

    Colton Mentone

    Fontana

    Redlands

    Highland

    Blue Jay

    Bryn Mawr

    Crestline Twin Peaks

    Loma Linda

    Lytle Creek

    Bloomington

    San BernardinoEast Highlands

    Running Springs

    Arrowhead Highlands

    15

    10

    10

    10

    215

    215

    215

    15

    91

    10

    60

    30

    66

    38

    138

    330

    210

    210

    Figure 5

    State Plane NAD 83, Zone V, feet10M DEM DWRSBVWCD Water Elevation2009- 2010 - 340 Wells IDW Interpolation Method Watermaster Services, All City Water Agencies and SBVMWD

    Cities#* 340 Wells

    Contour 50 ftAccurately Located Fault TracesApproximately located Fault TracesInferred Fault TracesConcealed Fault TracesAerial Photo LineamentHighwaysBunker Hill Basin BoundarySBV Water Conservation District BoundaryMajor Streams

    Depth to Water Fall 2009 (Ft) 1 - 5354 - 110120 - 160170 - 210220 - 260270 - 320330 - 370380 - 420430 - 500

    Seven Oaks Dam

    Engineering InvestigationMarch 2011

    Source: SBVWCD GISL. Pierce

    S ant

    a An

    a Ri

    ver

    SAN BERNARDINO MOUNTAINS

    CRAFTON HILLS

    SBVWCD\2010EI\EI2010Maps\Fig06_WellElevContour2009.mxd (03/11)

    SAN GABRIEL MOUNTAINS

    0 1 2 30.5

    Miles

    46 of 151

  • Water Elevation Contour Surface Fall 20102010-2011

    Engineering Investigation Report

    22

    22

    22

    22

    22

    22

    22

    22

    22

    22

    22

    22#*

    #*

    #*

    #*#*

    #*#*

    #*

    #*

    #*

    #*#*#*

    #*#*

    #*

    #*#*#*

    #*

    #*#*

    #*#*

    #*

    #*

    #*#*

    #*

    #*#*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*#*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*#*#*

    #*

    #*#*

    #*#*

    #*

    #*#*

    #*

    #*

    #*

    #*

    #*#*

    #*

    #*

    #*#*

    #*

    #*#*

    #*#*#* #*

    #*

    #*

    #*

    #*

    #*#*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*#*

    #*#*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #* #*#*

    #*#*

    #*#*#*

    #*

    #*

    #*#*#*

    #*

    #*

    #*

    #*#*

    #*#*

    #*

    #*#*

    #*

    #*

    #*

    #*#*

    #* #* #*

    #*

    #*#*#*

    #*#*#*

    #*#*#*

    #*#*#*#*

    #*#*#*#*#*

    #*#*

    #*#*#*#*#*#*

    #*

    #*

    #*#*

    #*#* #*

    #*

    #*

    #*

    #*

    #*#*

    #*

    #* #*

    #*#*

    #*#*#*#*#*

    #*#* #*

    #*

    #*

    #*

    #*#*#*#*

    #*

    #*

    #*

    #*

    #*

    #*#*

    #*#*

    #*

    #*

    #*

    #*#*

    #*

    #*

    #*

    #*#*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*#*#*

    #*

    #*

    #*

    #*#* #*

    #*

    #*

    #*

    #*#*

    #*#*

    #*#*#* #*#*

    #*

    #*#*

    #*#*

    #*

    #*

    #*#*#*#*#*#*#*#*

    #*#*#*

    #*

    #*

    #*#*

    #*#*

    #*#*#*

    #*

    #*

    #*#*

    #*#*

    #*#*#*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*

    #*#*#* #*#*

    #*

    #*

    #*

    #*

    #*#*

    #*

    #*

    #*

    #*

    #*

    #*#*#*#*#*#*

    #*

    #*

    #*#*

    #* #*#*

    Muscoy

    Rialto

    Devore

    Colton Mentone

    Fontana

    Redlands

    Highland

    Blue Jay

    Bryn Mawr

    Crestline Twin Peaks

    Loma Linda

    Lytle Creek

    Bloomington

    San BernardinoEast Highlands

    Running Springs

    Arrowhead Highlands

    15

    10

    10

    10

    215

    215

    215

    15

    91

    10

    60

    30

    66

    38

    138

    330

    210

    210

    Figure 6

    State Plane NAD 83, Zone V, feet10M DEM DWRSBVWCD Water Elevation2009- 2010 - 340 Wells IDW Interpolation Method Watermaster Services, All City Water Agencies and SBVMWD

    #* 340 WellsCitiesContourWE10i50Accurately Located Fault TracesApproximately located Fault TracesInferred Fault TracesConcealed Fault TracesAerial Photo LineamentHighwaysBunker Hill Basin BoundarySBV Water Conservation District BoundaryMajor Streams

    Depth to Water Fall 2010 (Ft)1 - 5354 - 110120 - 160170 - 210220 - 260270 - 320330 - 370380 - 420430 - 500

    Seven Oaks Dam

    Engineering InvestigationMarch 2011

    Source: SBVWCD GISL. Pierce

    S ant

    a An

    a Ri

    ver

    SAN BERNARDINO MOUNTAINS

    CRAFTON HILLS

    SBVWCD\2010EI\EI2010Maps\Fig06_WellElevContour2010.mxd (03/11)

    SAN GABRIEL MOUNTAINS

    0 1 2 30.5

    Miles

    47 of 151

  • Key Wells ( Appendix B Hydrographs)2010 - 2011Engineering Investigation Report

    /

    /

    /

    /

    /

    /

    /

    /

    //

    /

    /!A

    !A!A

    !A

    !A

    !A

    !A

    !A

    !A

    !A!A

    !A

    !A

    !A!A

    !A

    !A

    !A

    !A

    !A!A

    !A!A

    !A

    !A

    !A

    !A

    !A!A

    !A !A

    !A

    !A!A

    !A

    !A

    !A!A!A!A

    !A

    !A

    !A

    !A

    !A

    !A!A

    !A!A

    !A!A

    !A!A

    !A!A

    !A

    !A

    MC-05

    EPA 112

    Cooley D Tri-City

    Lee Well

    SBVWCD #1SBVWCD #2

    Well # 2City # 1

    Well No 7

    Well # 4

    SBVWCD #4SBVWCD #3

    Well #16Well # 13

    Well #34

    Mill -DMill G Geo

    Agate No 1

    Well No 8A

    Well No 35

    Well No 41

    Well No 32Anderson II

    Maguet # 2Maguet # 1

    PL # 9A

    PL #41PL # 27

    PL # 102

    19th St #2

    Cajon Canyon

    Gage 26-1

    Mill Creek No 1

    Raub # 1

    Antil # 6

    Cajon # 2

    Redlands Heights

    31st - Mt View

    Thorne #10 ELugonia # 6 E Lugonia # 3E Lugonia # 2Gould -Tippecanoe

    Stewart # 20Stewart # 19

    27th St - Acacia St16th St - Sierra Way

    Devil Canyon # 3Devil Canyon # 4

    Baseline -California

    17th -Sierra Way #2

    Cajon # 3

    SAR -Orange St

    30th - Mt ViewMuscoy

    Rialto

    Devore

    ColtonMentone

    Fontana

    Redlands

    Highland

    Blue Jay

    Bryn Mawr

    Crestline Twin Peaks

    Loma Linda

    Lytle Creek

    Bloomington

    East Highlands

    Running Springs

    Arrowhead Highlands

    15

    10

    10

    215

    215

    15

    91

    10

    60

    66

    38

    138

    330

    210

    210

    San Bernardino

    Figure 7

    State PlaneNAD 83, Zone V, feet10M DEM - DWR 2008Data Sources: 2010 -11SBVWCD, SBVMWD, WVWD

    !A Key Wells with Hydrographs (Appendix B)

    CitiesBunker Hill BasinHighwaysMajor Streams

    Engineering InvestigationMarch 201157 KEY Wells Refer to Appendix BMap Creation: SBVWCD GISL. Pierce

    San Timoteo Cr e ek

    S ant

    a An

    a

    River

    Ly t le Creek Caj on Creek

    SAN BERNARDINO MOUNTAINS

    CRAFTON HILLS

    M:\EIR\2011EI\EI2011Maps\Fig07_KeyWellsHydrograph.mxd (03/7/11)

    SAN GABRIEL MOUNTAINS

    0 1 2 30.5

    Miles

    48 of 151

  • Groundwater Production -Bunker Hill Basin SubbasinsTotal Well Production for July 2009 - June 2010 (Water Year)

    2010-2011Engineering Investigation Report

    22

    22

    22

    22

    22

    22

    22

    22

    22

    22

    22

    22

    Muscoy

    Rialto

    Devore

    Colton Mentone

    Fontana

    Redlands

    Highland

    Bryn Mawr

    Crestline Twin Peaks

    Loma Linda

    Lytle Creek

    Bloomington

    San Bernardino

    East Highlands

    Running Springs

    Arrowhead Highlands

    15

    10

    10

    215

    215

    215

    15

    91

    10

    60

    66

    38

    138

    330

    210

    210

    Figure 8

    State PlaneNAD 83, Zone V, feet10M DEM DWRData Sources:SBVWCD EI Production241 wells with 184 reportingWatermaster Services, All City Water Agencies and SBVMWD

    Production for 184 WellsWater Year Total

    No Reported Data1 - 966967 - 15591560 - 2368

    2369 - 3369

    CitiesHighwaysBunker Hill Basin BoundarySBV Water Conservation District BoundaryMajor Streams

    Seven Oaks Dam

    Engineering InvestigationMarch 2011

    Source: SBVWCD GISL. Pierce

    SAN BERNARDINO MOUNTAINS

    CRAFTON HILLS

    SBVWCD\2011EI\EI2011Maps\Fig08_Production.mxd (03/11)

    SAN GABRIEL MOUNTAINS

    0 1 2 30.5

    Miles

    49 of 151

  • PredictionChartforAnnualChangeinStorageCurrentandEnsuingWaterYears

    210,000

    230,000

    250,000

    270,000

    290,000

    Ann

    ual P

    rodu

    ctio

    n [a

    f]50,000-50,000 150,000

    Estimated annual change in storage of -19,158 acre-ft. for ensuing water yearEstimated annual change

    in storage of -22,457 acre-ft for current water year

    0-150,000Annual Change in Storage [af]

    SBVWCD2011EngineeringInvestigation Figure9

    150,000

    170,000

    190,000

    0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50Annual Precipitation [in]

    Change in Storage = -131730 + 7620 * Precipitation - 0.207 Production (R2 = 0.87)

    Assumptions for Current Water YearPrecipitation: 20.41 inches (98% of Normal)Production: 223,564 acre-ft (see Figure 10)

    Assumptions for Ensuing Water YearPrecipitation: 20.84 inches (100% of Normal)Production: 223,361 acre-ft (see Figure 11)

    * Based on Big Bear Dam, Camp Angelus, Devore CDF, Lake Arrowhead, Mentone CDF, Redlands Country Club, San Bernardino County Hospital, Santa Ana Powerhouse #3, and Yucaipa CDF.

    50 of 151

  • EstimateofProductionforCurrentWaterYear(July2010toJune2011)

    y = -476.54x + 233292R = 0.0176

    150,000

    200,000

    250,000

    300,000A

    nnua

    l Pro

    duct

    ion

    [acr

    e-ft

    ]

    Estimated Annual Production of 223564.9 acre-ft

    Regression analysis based on data for the period of July 1991 to June 2009

    SBVWCD2011EngineeringInvestigation Figure10

    0

    50,000

    100,000

    5 10 15 20 25 30 35 40 45 50 55 60 65

    A

    Average Annual Precipitation* [in]*Based on Big Bear Dam, Camp Angelus, Devore CDF, Lake Arrowhead, Mentone CDF,Redlands Country Club, San Bernardino County Hospital, Santa Ana Powerhouse #3, and Yucaipa CDF.

    Assumed Precipitation of 20.4 inches for Current Water Year (98% of Normal)

    51 of 151

  • EstimateofProductionforEnsuingWaterYear(July2011toJune2012)

    y = -476.54x + 233292R = 0.0176

    150,000

    200,000

    250,000

    300,000A

    nnua

    l Pro

    duct

    ion

    [acr

    e-ft

    ]

    Estimated Annual Production of 223361.2 acre-ft

    Regression analysis based on data for the period of July 1991 to June 2009

    SBVWCD2011EngineeringInvestigation Figure11

    0

    50,000

    100,000

    5 10 15 20 25 30 35 40 45 50 55 60 65

    A

    Average Annual Precipitation* [in]*Based on Big Bear Dam, Camp Angelus, Devore CDF, Lake Arrowhead, Mentone CDF,Redlands Country Club, San Bernardino County Hospital, Santa Ana Powerhouse #3, and Yucaipa CDF.

    AssumedPrecipitationof20.8inchesforEnsuingWaterYear(100%ofNormal)

    52 of 151

  • Engineering Investigation of the

    Bunker Hill Basin 2010-2011

    Tables

    Tables

    53 of 151

  • SummaryofPercentageofNormalPrecipitation1983to2010

    Station

    HistoricAnnualAvg.[in]

    19831984[in]

    19841985[in]

    19851986[in]

    19861987[in]

    19871988[in]

    19881989[in]

    19891990[in]

    19901991[in]

    19911992[in]

    19921993[in]

    19931994[in]

    19941995[in]

    19951996[in]

    19961997[in]

    19971998[in]

    19981999[in]

    19992000[in]

    20002001[in]

    20012002[in]

    20022003[in]

    20032004[in]

    20042005[in]

    20052006[in]

    20062007[in]

    20072008[in]

    20082009[in]

    20092010[in]

    EachStation27Yr.Avg.[in.]

    BigBearDam

    35.84 19.33 22.25 40.28 19.17 28.89 20.84 17.60 34.79 38.90 81.92 28.67 52.65 24.40 29.97 51.70 14.20 20.60 21.40 9.20 38.10 19.60 59.10 26.40 10.30 23.00 19.70 26.00 29.6

    CraftonHills

    12.17 5.62 5.90 12.64 9.00 12.11 10.00 6.30 12.27 10.69 22.99 5.45 27.10 7.84 16.67 25.55 7.29 6.40 10.49 2.46 17.57 9.47 31.39 11.45 3.34 13.34 8.82 17.80 12.2

    DelRosaRangerStation

    18.10 11.95 15.40 20.13 9.48 18.92 13.16 12.85 8.79 24.24 41.39 12.30 27.69 14.21 17.31 37.26 8.30 12.73 16.60 6.09 19.69 13.02 38.55 17.40 8.77 17.77 13.57 22.01 17.8

    DevoreCDF

    27.12 21.53 23.99 36.79 12.39 17.90 10.75 15.00 20.41 31.32 63.98 15.40 45.44 20.58 33.10 45.13 13.61 8.04 15.52 10.90 35.35 16.44 60.36 24.80 8.86 25.21 16.51 34.12 25.3

    Fallsvale 31.94 19.00 16.90 50.00 23.00 20.30 3.50 51.00 22.50 36.00 71.90 52.00 54.90 22.10 33.80 53.00 16.30 21.20 15.30 6.50 37.50 25.20 61.40 26.90 11.10 29.30 24.70 2.85 29.9Lake

    Arrowhead

    40.30 27.07 30.76 50.56 23.74 40.39 28.51 26.62 23.68 45.24 85.00 28.20 74.51 30.84 36.50 72.80 18.10 25.80 28.60 10.70 36.50 22.70 69.70 46.20 18.50 41.91 30.28 26.00 37.0

    LomaLi d FD

    10.80 6.08 9.15 13.16 7.41 10.45 8.84 7.69 7.16 13.44 25.56 10.99 19.02 7.15 9.78 22.74 5.12 7.74 6.38 2.45 14.48 8.06 22.59 11.06 3.51 9.63 8.95 13.10 10.8

    SBVWCD2011EngineeringInvestigation Table1

    LindaFD10.80 6.08 9.15 13.16 7.41 10.45 8.84 7.69 7.16 13.44 25.56 10.99 19.02 7.15 9.78 22.74 5.12 7.74 6.38 2.45 14.48 8.06 22.59 11.06 3.51 9.63 8.95 13.10 10.8

    LytleCreekatFoothill

    13.38 8.93 10.19 16.04 7.00 12.96 3.90 8.50 15.51 14.91 31.61 9.16 25.51 12.23 13.83 25.84 6.25 9.81 12.12 4.00 13.60 7.16 27.23 11.22 3.84 11.89 9.03 13.03 12.8

    LytleCreekFireStation

    23.82 12.60 18.95 27.60 11.20 22.40 12.83 17.90 32.07 49.09 87.71 20.50 47.57 24.49 23.10 52.18 11.81 20.40 18.34 4.47 16.96 12.09 44.11 18.92 4.22 21.89 3.32 0.00 23.6

    MentoneCDF

    12.53 5.09 7.74 12.01 9.23 8.85 8.64 6.13 12.55 15.93 23.85 8.35 17.10 9.42 15.73 27.09 4.28 9.08 10.16 4.06 15.00 10.38 24.94 11.01 5.41 10.75 9.38 14.96 11.7

    OakGlen 26.84 18.80 22.02 26.00 19.29 21.46 17.82 17.71 26.92 30.78 57.96 18.76 57.92 20.04 30.39 49.46 11.32 17.12 12.28 6.72 14.28 18.39 34.14 22.58 9.71 27.60 19.92 29.72 24.4Redlands

    Roth12.19 4.99 8.72 9.25 7.79 11.18 8.08 7.21 13.34 14.96 25.57 10.06 20.49 8.08 10.77 22.29 6.46 7.41 10.38 3.35 12.18 9.16 24.43 9.52 3.31 9.46 8.82 15.12 11.2

    RedlandsCountryClub

    13.65 8.16 10.74 13.38 8.80 14.18 10.68 8.58 14.48 16.11 29.44 12.55 19.76 8.52 9.03 17.22 6.30 5.68 9.96 3.97 16.45 11.58 29.37 10.30 4.13 11.93 11.35 17.25 12.6

    SanBernardino CDF

    17.22 11.14 16.06 20.12 9.27 18.26 12.85 10.55 15.49 21.89 37.35 4.46 20.29 15.77 16.17 34.32 9.30 13.62 16.61 5.29 13.14 11.52 37.28 16.39 6.33 18.91 9.85 20.45 16.4oCDFSan

    BernardinoCo.

    Hospital

    15.88 10.81 12.86 17.86 8.08 13.53 12.63 8.12 15.48 16.54 30.78 11.65 24.10 11.92 17.80 32.67 8.02 11.09 2.33 3.60 17.06 10.49 29.89 13.20 4.68 12.81 10.05 17.03 14.3

    SantaAnaPumphouse#3

    17.00 14.15 11.88 15.87 12.28 14.67 9.38 10.32 15.84 18.38 22.98 15.92 24.85 11.05 16.60 27.95 7.01 6.78 8.63 3.23 18.24 9.40 27.65 11.78 6.13 10.73 9.73 14.58 13.9

    YucaipaCDF

    15.73 9.75 10.69 12.96 11.02 11.33 9.74 7.25 11.16 17.85 34.20 11.40 30.24 10.52 15.62 24.70 7.63 11.10 9.92 5.66 19.47 11.84 32.70 13.14 6.56 14.67 12.11 18.79 14.5

    YucaipaValleyWaterDistrict

    15.82 9.66 12.31 15.20 10.55 14.36 10.55 10.84 16.98 18.68 18.08 12.51 25.20 10.88 16.93 28.60 9.87 9.63 9.65 5.27 19.50 11.10 32.73 12.52 5.53 14.79 12.11 17.68 14.5

    RedlandsDailyFacts

    12.75 7.95 10.42 11.25 9.14 12.72 8.86 7.65 13.75 16.00 27.99 12.08 21.34 8.24 12.58 27.15 6.10 7.88 10.25 3.58 16.03 9.39 26.42 10.64 4.03 9.80 9.00 0.00 11.9

    BigBear13 48 17 57 13 23 19 12 10 18 10 59 9 37 10 23 17 81 13 96 22 92 11 53 18 59 11 17 12 06 16 83 6 53 4 75 20 14 3 33 12 62 7 55 23 25 14 36 3 67 8 53 3 51 16 24 12 6

    City13.48 17.57 13.23 19.12 10.18 10.59 9.37 10.23 17.81 13.96 22.92 11.53 18.59 11.17 12.06 16.83 6.53 4.75 20.14 3.33 12.62 7.55 23.25 14.36 3.67 8.53 3.51 16.24 12.6

    PercentofNormal

    100% 65% 75% 114% 62% 87% 60% 69% 91% 120% 218% 81% 169% 75% 100% 180% 48% 61% 69% 27% 104% 66% 191% 88% 34% 89% 65% 87% 92%

    TotalStationAverage

    19.33

    Source:SanBernardinoCountyDepartmentofTransportation/FloodControl

    SBVWCD2011EngineeringInvestigation Table1

    54 of 151

  • ChangeinGroundwaterLevelsinKeyWellsFall2009toFall2010

    WCDCodeStateWellNumber

    WellNameOwnerOrMeasuring

    Agency

    2009DepthToWater(ft)

    2010DepthToWater(ft)

    DifferenceFall2009

    toFall2010

    1865 1N4W25A01S 27 EastValleyWaterDistrict 258.6 206.0 52.61984 1N3W30N01S 41 EastValleyWaterDistrict 305.6 306.0 0.41364 1S3W04J01S 102 EastValleyWaterDistrict 230.2 230.0 0.21401 1S3W01H01S 142Mt.Harrison EastValleyWaterDistrict 282.9 220.5 62.41660 1N3W33F01S 94Corwin EastValleyWaterDistrict 390 393.6 3.61851 1S3W06H04S 9A EastValleyWaterDistrict 216.6 216.2 0.41010 1S3W09E02S TriCityConcrete EastValleyWaterDistrict 215.6 217.2 1.61727 1S2W19K01S Agate#1 Redlands,Cityof 125.0 140.0 15.01708 1S2W22C02S E.Lugonia#2 Redlands,Cityof 0.01712 1S2W21B02S E.Lugonia#3 Redlands,Cityof 28.0 28.0 0.01714 1S2W21D01S E.Lugonia#6 Redlands,Cityof 58.0 51.0 7.01970 1S3W32J02S LeeWell Redlands,Cityof 214.0 219.0 5.01706 1S2W36F01S Maguet#1 Redlands,Cityof 21.0 20.0 1.01709 1S2W21E01S Maguet#2 Redlands,Cityof 35.0 45.0 10.01707 1S1W08H01S MillCreek#1 Redlands,Cityof 12.0 0.0 12.01819 1S3W15F01S OrangeStreet Redlands,Cityof 135.0 154.0 19.01591 2S3W01E01S RedlandsHeights Redlands,Cityof 167.0 170.0 3.01718 1S3W35G09S Well#13 Redlands,Cityof 66.0 64.0 2.01720 1S3W35H03S Well#16 Redlands,Cityof 47.0 44.0 3.01722 1S3W21H01S Well#32 Redlands,Cityof 200.0 205.0 5.01723 1S4W24K01S Well#34 Redlands,Cityof 185.0 196.0 11.01964 1S3W22A02S Well#35 Redlands,Cityof 229.0 232.0 3.01725 1S3W28H01S Well#41 Redlands,Cityof 172.0 276.0 104.01702 1N5W23Q01S City1 Rialto,Cityof 263.0 284.0 21.01668 01S/04W02P002S CooleyD Riverside,Cityof 141.5 0.01662 1S4W14P02S Raub1 Riverside,Cityof 158.0 164.0 6.01677 1S4W27A19S Stewart19 Riverside,Cityof 146.0 0.01744 1S4W27H01S Stewart20 Riverside,Cityof 168.1 0.01767 1S4W22B03S Thorn10 Riverside,Cityof 58.0 0.01683 1S4W22H04S Warren 1 Riverside, City of 156.0 0.01683 1S4W22H04S Warren1 Riverside,Cityof 156.0 0.01554 1S4W23A02S 261 Riverside,CityOfGageCanal 152.0 158.0 6.02291 1S2W07B01S SBVWCD#1 SanBernardinoValleyWaterCons.Dist. 240.6 207.2 33.42290 1S2W07K01S SBVWCD#2 SanBernardinoValleyWaterCons.Dist. 158.6 151.6 7.02286 1S3W12J01S SBVWCD#3 SanBernardinoValleyWaterCons.Dist. 153.9 135.2 18.72288 1S3W11H01S SBVWCD#4 SanBernardinoValleyWaterCons.Dist. 195.2 171.0 24.21526 1N4W34G03S 16th&SierraWay SanBernardino,Cityof 252.2 161.0 91.21525 1N4W34G01S 17th&SierraWay#2 SanBernardino,Cityof 241.5 0.01517 1N4W32D03S 19thStreetNo.1 SanBernardino,Cityof 305.4 0.01520 1N4W27M02S 27thStreetWell SanBernardino,Cityof 301.5 287.5 14.01519 1N4W27G01S 30th&Mtn.View SanBernardino,Cityof 332.0 318.9 13.11979 1N4W27B01S 31st&Mtn.View SanBernardino,Cityof 339.3 324.2 15.12066 1S4W02K08S AntilWell#6 SanBernardino,Cityof 185.0 172.0 13.02062 1N4W32N01S BaselineWell SanBernardino,Cityof 265.0 257.0 8.01510 2N5W19K02S CajonCanyonWell SanBernardino,Cityof 68.2 56.1 12.11910 1N5W03H02S CajonWell#2 SanBernardino,Cityof 190.9 153.0 37.92115 1N5W03A02S CajonWell#3 SanBernardino,Cityof 184.8 147.5 37.32008 1N4W06H02S DevilCanyon#3 SanBernardino,Cityof 28.4 26.9 1.52007 1N4W06H01S DevilCanyon#4 SanBernardino,Cityof 41.4 41.2 0.23139 01N/04W32PS EPAEXTRACWELL112 SanBernardino,Cityof 394.4 424.0 29.61537 1S4W10N06S Mill&D SanBernardino,Cityof 89.2 93.5 4.31514 1N4W16E01S Newmark#1 SanBernardino,Cityof 180.5 185.4 4.91516 1N4W16E03S Newmark#3 SanBernardino,Cityof 187.3 190.8 3.51647 1N4W26P03S PerrisHill#5 SanBernardino,Cityof 279.4 272.6 6.8

    01S/04W22C #21,WastewaterNMW#1 SanBernardino,Cityof/shallowwells 0.02448 1S4W23H #52Brier/Gould/Tippecanoe SanBernardino,Cityof/shallowwells 197.4 38.0 159.41936 1N5W23Q01S 2/Lower7 WestValleyWaterDistrict 250.0 292.0 42.01419 1N5W25E01S 5A/Lower5 WestValleyWaterDistrict 261.0 271.0 10.01612 1N5W36H04S 7/Lord7 WestValleyWaterDistrict 427.0 0.02271 1S4W25D07S AndersonII WesternMunicipalWaterDistrict 0.0

    SBVWCD2011EngineeringInvestigation Table2

    55 of 151

  • AnnualChangeinStorageforBunkerHillBasinFall2009toFall2010

    [1] [2] [3] [4]

    SubareaAnnualChangeinWaterLevel

    2010Area Storativity(S )

    AnnualChange

    inStorage**

    [ft] [acres] [acreft]BunkerHillINortheastof215Freeway 12.7 7,795 0.11 10,922BunkerHillISouthwestof215Freeway 3.2 11,714 0.09 3,417BunkerHillIIWestofMentoneFault 11.7 35,206 0.06 24,764BunkerHillIIEastofMentoneFault,North 18.1 8,584 0.13 20,248BunkerHillIIEastofMentoneFault,South 0.8 2,507 0.13 244LytleBasinNorthwestofBarrierJ 1.1 1,924 0.13 270LytleBasinSoutheastofBarrierJ 8.3 5,237 0.07 3,052PressureZoneNorthofSantaAnaWash 0.2 11,920 0.02 42PressureZoneSantaAnaWash 0.9 6,686 0.02 123

    Total = 56 977

    SBVWCD2011EngineeringInvestigation Table3

    Total= 56,977[1]BasedonaveragechangesinwaterlevelwithineachSubarea[2]EstimatedusingGIS[3]BasedondatafromHardtandHutchinson(1980).S,storativity:Theamountofwaterstoredorreleasedperunitareaofaquifergivenunitheadchange.[4]=[1]x[2]x[3]*Apositivesigndenotesanincreaseinwaterlevelandanegativesignrepresentsadeclineinwaterlevel.**Apositivesigndenotesanincreaseinstorageandanegativesignrepresentsadeclineofstorage.

    SBVWCD2011EngineeringInvestigation Table3

    56 of 151

  • AccumulatedChangeinStorageforBunkerHillBasin1989to2010(Basedon"ZeroYear"of1993)

    YearAccumulatedStorage

    [acreft]1989 58,0001990 170,7001991 196,0001992 191,0001993 01994 50,0001995 41,1001996 43,1001997 75,5001998 40,4001999 85,7002000 131,1002001 212,2002002 301,5002003 338,8002004 406,9002005 183,1002006 245,5002007 359,4002008 362,000

    SBVWCD2011EngineeringInvestigation Table4

    2009 397,6002010 340,623

    Note:Anegativesignindicatesadeclineinstorageandapositivesignrepresents

    SBVWCD2011EngineeringInvestigation Table4

    57 of 151

  • ProductionforSubbasinsofBunkerHillBasinPrecedingWaterYear(July2009toJune2010)

    Subarea

    ProductionJuly2009toJune

    2010

    [acreft]2

    BunkerHillINortheastofInterstate215 7,196BunkerHillISouthwestofInterstate215 20,621BunkerHillIIWestofMentoneFault 37,020BunkerHillIIEastofMentoneFault,North 5,878BunkerHillIIEastofMentoneFault,South 4,010LytleBasinNorthwestofBarrierJ 2,072LytleBasinSoutheastofBarrierJ 22,965PressureZoneNorthofSantaAnaWash 74,616PressureZoneSantaAnaWash 39,648

    Total 214,025

    Notes:273WellsUsedintheseCalculations1Estimatedfrompriorwateryear(July2009June2010)production.2EstimatedforWaterYearJuly2009J